package com.wellgoon.test.jse81;

public class CD {
    int r;

    public CD(int r) {
        this.r = r;
    }
}

class DVD extends CD {
    public DVD(int r) {
        super(r);
    }

    int c;
    public DVD(int r,int c) {
        super(r);
        this.c = c;
    }
}
